Import Question JSON

Current Question (ID: 18031)

Question:

$\text{The mass percentage of aspirin (C}_9\text{H}_8\text{O}_4\text{) in acetonitrile (CH}_3\text{CN) when 6.5 g of C}_9\text{H}_8\text{O}_4\text{ is dissolved in 450 g of CH}_3\text{CN will be:}$

Options:

1. $1.424\%$
2. $4.424\%$
3. $5.124\%$
4. $2.124\%$

Solution:

$\text{Mass percentage} = \frac{\text{amount of C}_9\text{H}_8\text{O}_4}{\text{amount of CH}_3\text{CN}} \times 100$ $\text{6.5 g of C}_9\text{H}_8\text{O}_4 \text{ is dissolved in 450 g of CH}_3\text{CN.}$ $\text{Then, total mass of the solution} = (6.5 + 450) \text{ g} = 456.5 \text{ g}$ $\text{Therefore, mass percentage of C}_9\text{H}_8\text{O}_4 = \frac{6.5}{456.5} \times 100 = 1.424\%$

Import JSON File

Upload a JSON file containing LaTeX/MathJax formatted question, options, and solution.

Expected JSON Format:

{
  "question": "The mass of carbon present in 0.5 mole of $\\mathrm{K}_4[\\mathrm{Fe(CN)}_6]$ is:",
  "options": [
    {
      "id": 1,
      "text": "1.8 g"
    },
    {
      "id": 2,
      "text": "18 g"
    },
    {
      "id": 3,
      "text": "3.6 g"
    },
    {
      "id": 4,
      "text": "36 g"
    }
  ],
  "solution": "\\begin{align}\n&\\text{Hint: Mole concept}\\\\\n&1 \\text{ mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6] = 6 \\text{ moles of carbon atom}\\\\\n&0.5 \\text{ mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6] = 6 \\times 0.5 \\text{ mol} = 3 \\text{ mol}\\\\\n&1 \\text{ mol of carbon} = 12 \\text{ g}\\\\\n&3 \\text{ mol carbon} = 12 \\times 3 = 36 \\text{ g}\\\\\n&\\text{Hence, 36 g mass of carbon present in 0.5 mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6].\n\\end{align}",
  "correct_answer": 4
}